swathika28 / read-and-write-image

READ AND WRITE AN IMAGE

AIM

To write a python program using OpenCV to do the following image manipulations.

1. Read, display, and write an image.
2. Access the rows and columns in an image.
3. Cut and paste a small portion of the image.

Software Required:

Anaconda - Python 3.7

Algorithm:

Step1:

Choose an image and save it as a filename.jpg

Step2:

Use imread(filename, flags) to read the file.

Step3:

Use imshow(window_name, image) to display the image.

Step4:

Use imwrite(filename, image) to write the image.

Step5:

End the program and close the output image windows.

Program:

Developed By: SWATHKA G
Register Number: 212221230113

i) Read and display the image

import cv2

img = cv2.imread("aot.png")
cv2.imshow("read_pic",img)
cv2.waitKey(0)
cv2.destroyAllWindows()

ii) To write the image

cv2.imwrite("write_pic.png",img)

iii) Find the shape of the Image

print(img.shape)

iv) To access rows and columns

import random
for i in range (500,1000):
    for j in range(150,3582):
        img[i][j]=[random.randint(0,100),random.randint(0,80),random.randint(0,250)]
cv2.imshow("row_pic.png",img)
cv2.waitKey(8000)
cv2.destroyAllWindows()

v) To cut and paste portion of image

img[1300:2100,:] = img[400:1200,:]
cv2.imshow('cut',img)
cv2.waitKey(0)
cv2.destroyAllWindows()

Output:

i) Read and display the image

ii) Write the image

iii) Shape of the Image

iv) Access rows and columns

v) Cut and paste portion of image

Result:

Thus the images are read, displayed, and written successfully using the python program.